I am hooking up my iPhone to my car stereo from a 3.5 to RCA (it is rare i know)however, unless i turn down the volume on my stereo, my GPS apps voice gets distorted. Would it be better to use a connnection that uses the dock connector to RCA? also, when i try to use the Voice Control, you can barely hear the iPhone computerized voice speaking through my speakers...is there a way to fix that?